Library conveyer system



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Patented Feb. l2, 1935 UNITED STATES PATENT OFFICE IJBRARY CONVEYERSYSTEM Application April 17, 1931, Serial No. 530,777

18 Claims.

This invention relates to library conveyers, and certain of its objectsand advantages will be clear from the following.

Heretofore, in library conveyors it has been the practice to use twochains between which the carriers for the books have been supported.Among the disadvantages of this arrangement are the following: Arelatively deep conduit or shaft is required to house the conveyer andloading must be accomplished first by movement through a suitableopening, in a direction at right angles to the plane of the oppositelymoving sections of the chains, followed by a movement at right angles tothe first movement, i. e., by a movement in a direction parallel to thesaid plane. Unloading has to take place in a direction parallel to saidplane, and in addition suitable space must be provided to the side ofthe shaft for the unloading platform and book receptacles. Loading andunloading is, therefore, relatively inconvenient, and. substantial spacewhich might be otherwise utilized is required. Furthermore, the chainslengthen or stretch, unevenly cocking the carriers and introducingoperating difficulties which render this type of conveyer relativelyunsatisfactory.

By the present invention these difficulties are overcome and the expenseof the installation very materially reduced. I propose to provide aconveyer employing a single chain with the carrier suspended from a sideof the chain sothat loading and unloading may take place in a directionperpendicular to the plane of the oppositely moving sections of thechain. This not only facilitates loading and unloading but reduces thesize of the shaft necessary. The shaft may be located. in the wall, andthe only space required for the unloading platform or receptacle is thatwhich is immediately in front of the shaft. Stated in another way, theshafts may be very shallow as compared to the shafts required in theconstruction previously described, and no space need be provided in thewall to accommodate unloading devices or to provide room for theattendants.

My invention also contemplates the provision of a novel conveyer chainespecially adapted for use in conveyer systems of the characterdescribed.

'Another object of the invention is the provision of a conveyer systemin which books or the like may be automatically discharged atpreselected points in the system.

More specifically, it is an object of the invention to provide aconveyer system having a central distributing station and a plurality ofdischarging stations, any one of which may be Stlected for the dischargeof books to be distributed by control from the distribution station,thus enabling the distribution of books to various points in the systemto be at the command of a single operator.

A further object resides in the provision of a conveyer system havingcarriers adapted to selectively actuate automatic unloading deviceslocated at various points in the system.

The invention also contemplates apprising an operator of operatingconditions in the system.

Another object of the invention is the provision of a conveyer system inwhich the carriers for the books being handled are mounted in a novelmanner to prevent displacement of the books as the carrier traverses thesystem.

Among the more specific objects of the invention are the provision ofnovel devices of the folfollowing character: Selector devices, aselector setting device, a control device for the setting device,unloading. devices, devices for restoring the selector devices to normalposition, safety devices to prevent injury to operators as well as tothe system, an overload device, a take-up device, re-

' ceptacles for books discharged from the system,

signal devices, and, motor control devices. Various objects andadvantages, as well as the operation of the above devices, will bereadily understood as the description of the invention proceeds.

How the foregoing, together with such other objects and advantages asmay hereinafter appear, or are incident to the invention, are realized,is illustrated in preferred form in the accompanying drawings, wherein-Fig. 1 is a plan section diagrammatically illustrating the old type oftwo chain conveyer referred to above.

Fig. 1A is a plan section diagrammatically illustrating the single chainconveyer of my invention.

Fig. 1B is a diagrammatic perspective view illustrating a general layoutof a conveyer system in accordance with the invention.

Fig. 2 is a diagrammatic fragmentary elevational view of a portion of aconveyer system constructed in accordance with the invention.

Fig. 3 is a front elevational view of a selector setting device.

' Fig. 4 is a cross section taken on the line 4-4 of Fig. 3 with aselector member illustrated in dot-and-dash lines in its normal positionand in its set or selective position.

Fig. 5 is a sectional elevation view of what may be termed the readingor delivery room station of the system and illustrating the manner ofcon-

